*{
    margin:0;
    padding:0;
}
a{
    text-decoration:none;
}
.fr{
    float:left;
}
.fl{
    float:right;
}
.clearfix:after{
    content:"";
    clear: both;
    display:table;
}
img{
    vertical-align: middle;
}
.box{
    width:300px;
    margin:40px auto;
    padding:30px;
    border:1px solid #999;
    border-radius:20px;
}
.top{
    height:40px;
    line-height: 40px;

}
.ting{
    color:red;
}
.jinri{
    margin-left:10px;
}
.nav{
    padding:15px;
}
.tu1{
    margin-top:20px;
    position:relative;
}
.fu{
    position:absolute;
    left:55px;
    top:-15px;
}
.tu2{
    margin:20px auto;
}
.tu2,.tu4,.tu6{
    margin:20px auto;
}
.tu{
    padding-right:30px;
}
a{
    color:red;
}
a:hover{
    color:pink;
    text-decoration:underline;
}